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  1. Unheated 1.75 Ct. Octagon Cut Natural Green Tourmaline Gemstone

    Price:  $37.50

    Product ID: 807235341
    Product Name: Tourmaline
    Price : $37.50
    Weight: 1.75
    Jewelry Size: 7.4 x 5.5 x 4.7 Mm
    Shape: Octagon
    Color: Green
    Clarity: SI
    Luster: Good
    Origin: Nigeria
    Treatment: Unheated
    Crystal Structure: Trigonal
    Hardness: 7 - 7.5
    Specific Gravity: 3.0+
    Refractive Index: 1.62 - 1.68
    Chemical: Na(Li,Al)3Al6(B03)3 Si6O18(OH)4
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